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New Model MTI-755 Offers Low Cost, High Reliability

Monolithic Main Memory for IBM 370/155 Users.

Introduction

The 370/155 user now has a lowercost, more reliable alternative for

memory storage. The significant

cost savings is reason enough touse the MTI-755. In addition,

designed-in reliability, self-diag-

nostic hardware and plug-for-

plug compatibility make it easy tounderstand why the MTI-755 was

the first 370/155 monolithic main

memory purchased by a user.

Features

Low cost

Up to 2 million bytes of storage

Complete System / 370

compatibility- no CPU modi-fication required.

Increased Reliability Internal self test and fault diag-

nosis (to isolate memory from

CPU for maintenance).

Replaceable memory arraycards for rapid, simplified

maintenance.

All standard 370/155 memory

upgrades available.

Field upgradeable to larger

memory sizes.

Up to 77%floor space saving

50% less power required. 370 level of diagnostic and

maintenance capability.

General DescriptionThe MTI-755 Monolithic Main

Memory System is a plug-for-plug

equivalent to the IBM 3360 Basic

Storage Module used on the370/155 computer. The memory

connects directly to the StorageAdapter in the 3155, without Cen-

tral Processor modification. All

standard storage increments, from

256K bytes to 2 million bytes areoffered. All memory specifications

of the IBM 3360 are met or

exceeded by the MTI-755. Mono-lithic Semiconductor technology

provides a five fold increase in

reliability.

Memory Technology, Incorporated 1972

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Technology of the 70'sMonolithic Semiconductor isclearly the technology of the 70's- already chosen by IBM for its

370/135 and 145 memories. MTI'sMonolithic Semiconductor designresults in the over-riding purchaseconsideration: significant costsavings.

Increased Reliability -In addition, Monolithic Semi-conductor reliability surpassesother main memory approachesbecause of the substantially fewercomponents and fewer wiredinterconnections.

Reduced Power Consumption -

Less than half that of IBM memory- minimizes power requirementsand reduces air conditioningloads.

Space Savingsup to 77% aremadepossible by MTI's Monolith icSemiconductor technology - up to2 million bytes can be containedin the same amount of floor spacerequired for 512K bytes of con-ventional core storage.

Memory UpgradesField expansion of the MTI-755 tomeet increasing capacity require-ments is also greatly simplified.

MTI's approach allows completeflexibility from an additional 256Kbytes to the full 2 mill ion bytes.For example, field expansion from256K bytes to 512K bytes isaccomplished by simply pluggingin additional array cards into thepre-wired connectors in the MTI-755.

For capacities larger than 1 mil-lion bytes a second enclosure isused.

CompatibilityThe MTI-755 is attached directlyto the existing IBM MemoryCables, and operates at the same

speed as the IBM 3360. Whenreplacing a 3360, no CPU modi-fications are required.

MaintainabilityComplete hardware diagnosticcapability is an integral part of theMTI-755. This feature enables theCustomer Engineer to locate faultsquickly, and to identify individualarray cards in the system for easyreplacement. Fewer componentsand the organization of mono-lithic semiconductor componentson the Array Cards not only helpsimplify circuitry, but also mini-mize down time.

Monolithic semiconductor device stores2,048 bits.

Semiconductor memory card in theMTI-755 stores 16K bytes of information.

MTI-755 enclosure houses up to 1,024Kbytes of storage.

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83 Boston Post RoadSudbury, Massachusetts 01776(617) 443-9911 (617) 891-8465

Memory Technology is a six-year-old American Research and Devel-opment Company engaged in thedesign and manufacture of mem-

ory systems for the computerindustry and the computer user.Over 9,600 memory systems havebeen delivered, including READ-Only memories, minicomputeradd-on memories, RAM systems,and main memories. Over 2,000 ofthese memories are being used inIBM plug-to-plug compatiblecontrollers.

Technologies developed andimplemented by MTI haveinvolved proprietary core tech-niques as well as MOS and

bi-polar semiconductor tech-nologies. The 700 Series of plug toplug compatible System 370 MainMemory Systems developed byMTI demonstrate the Company'scontinuing commitment-andcapability-to provide the mem-ory technology of the 70's.